Trolley-base.



' PATENTBD 0cm. 23,1906;

' H. HOLLAND. TROLLEY BASE.

APPLICATION FILED AUG.5, 1005.

ATTEST Hum-W 7o-Umd, I B w 74W Amy ms NORRIS pzrrns'cm, WASHINGTON, n. c.

UNITED STATES" PATENT OFFICE.

Specification of Letters Patent.

Application fil ed August 6,1906. Serial No. 272,819.

To all whom, it may concern:

Be it known that I, HENRY HOLLAND, a

. citizen of the United States, residing at Cleveland in the county of Ouyahoga and State of have invented certain new and useful Improvements in Trolley Bases and I do declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in trolley-bases;- and the improvement consists in the construction and arrangement of parts substantially as hereinafter described, and more particularly pointed out in the claims.

One of my objects is to provide a compact device adapted to seat and to fold close upon the roof of the car, and another object is to provide a construction whereby the trolley may be readily held down in a substantially horizontal position for convenience of adjusta damaged pole.

A further object is embodied in the construction of the shouldered spring-rods to prevent complete closing of the spring and to imit the adjustability of its tension.

Another object is embraced in the adjustability of the ivot for the spring rods or bars in respect to t efulcrum-points of the trolleypole and whereby the same device may be used for either city or suburban cars or where the conditions vary considerably.

In the accompanying drawings, Figure 1 is a perspective v1ew of my improved trolleyment or to substitutev a new trolley-pole for base, showing the trolley-pole tilted or inclined as in use. Fig. 2 is a central vertical section of the device with the trolley-pole erect, as it appears when out of use. Fig. 3 is a sectional view at right angles to Fig.

2 with all the parts in the same relation as in said figure. Fig. 4 is a side elevation of the device with the trolley-pole in a horizontal position and showing a part in section interposed between the fulcrum member of the pole and the standard extension on the base.

A represents a flanged ring or support which is formed with a race for balls 2,upon which a rotatable bearing-plate 3 is adapted to rest and ride. Plate 3 is bolted rigidly upon base-plate 4, which su ports all the working parts for supporting t e trolley-pole B. A ring or cover 5 is bolted to lugs 6 of support A and overlaps member 3 sufficiently to confine it in place. Base-plate 4 and all it carries is thus rotatably supported base is provided, so as to give rigidity and firmness to the structure as a whole.

Base-plate 4 is provided with two pairs of vertical standards 7 and 8, respectively, at

Patented Oct- 23, 1906.

in a compact housing, and a broad seatingeach side of its vertical center, and each pair of standards 7 and 8 are s aced apart sufiiciently to permit a link or ar 9 to have free movement between them. Links 9 are pivotally secured to the standards by a cross-pin 10, mounted within either set of the oppositely-disposed openings 11 or 12 in said standards. Openings 11 and 12 are. arranged in a vertical line one above the other, and pin 10 can be changed toeither set of openings, so that the pivot for link 9 may be raised or lowered in respect to the fulcrumpoints of the trolley-pole.

A air of cross shafts or pins 13 arefastene in parallel lines equally distant at each side of the vertical center of face-plate 4 and come close upon the bottom of standards 7. A tubular socket C for trolley-pole D is provided with a T-shaped head 14 inned, or secured thereto at its lower en and which head has semicircular grooves across its bot-- 'tom corresponding to and adapted to rest upon shafts 13. When pole 3 is tilted either to the right or the left, one or the other of the shafts 13 becomes the pivot or fulcrum of its movement, and lips 15 upon head 14 thereupon pass beneath the shaft engaged and combine with lugs 16 on plate 4 to prevent head 14 from being removed or dislodged from its position or relation with plate 4.

The s ring tension for pole B is obtained by a yoke D, sleeved u on socket O, and a coiled spring E is seate within yoke D and bears at its opposite end against the shoulder of head 14. Links 9 have threaded ends 17, which pass through the nuts 18, which engage ears on yoke D, and whereby a certain degree of adjustment of the spring tension is obtainable. As the pivot or fulcrum of the trolley-pole is lower and to one side of the pivot of the link-bar 9, the radial movement of said parts in either direction of the vertical center will cause a compression of spring O, and this compression may be made more or less by adjusting-nuts 18; but as springs O are preferably closely coiled a limit to this adjustment is necessary; otherwise the coils of the spring will contact before the limit of movement of trolley-pole B would be reached, and the parts would come to a set position andv seriously strain the device. I

therefore provide shoulders 20 upon links 9 to limit the adjustment of yoke B :thereon, so that the s ring can never become fully closed upon itse f.

Socket 0 has a shouldered portion 2% against which the lower end of the trolleypole abuts, and a clamp member'22, bolted to the upper end of socket C, frictionally holds pole B in place. Standards 7 are preferably ,of such length or are provided with extensions 23, so that when trolley-pole B is drawn to a substantially horizontal osition a rod or bar 24 may be interposed etween extension 23 and head 14 to hold the parts in this tilted position. A new trolley-pole may then be readily substituted for a damaged one, or adjustment of the parts can be conveniently made without danger of the trolley-pole engaging the feed-wire, as would occur if it remained in an upright position.

The conditions for city and surburban cars diiierthat is, the height of the cars and distance of the trolley-wire from the ground vary so materially in places that the tension of the spring in one place is not sufficient for another. I therefore provide more than one set of o enings for pin 10, which when changed fiom one to the other will make up in the diiference of movement in the parts and provide for a different degree of tension dependent upon the place where the device is to be used.

What I claim is 1. In a trolley base or stand, a base-plate, a trolley-pole socket having double fulcrum-. rests upon said plate, a coil-spring and a sliding yoke upon said socket, a link connected with said yoke and adjustable pivot comiections forsaid linkland said base-plate.

2. In a trolley base or stand, a base-plate, a .trolley pole socket havin double fulcrum- -rests upon said plate, a coi spring and a sliding yoke upon said socket, links for said yoke, standards upon said base-plate, sets of openings in said standard and a pivot-pin for said link adapted to be secured in eit 161 of said sets of openings.

3. In a trolley base or stand, a base-plate, a trolleypole socket provided with a head adapted to make double fulcrum engagement with said plate, a sliding yoke and" a coil-spring upon said socket, a link connecting said yoke and said base-plate, and standards upon said base-plate at each side of said socket adapted to form a rest for an interposing locking member when inserted between said standard and said yoke and tilted.

4. In a trolley base and stand, a base-plate having vertical standards, a pair of crossshafts mounted between said standards, a trolley-polesupporting member having a head pivotally engaged with said cross-shaft, lips depending from said head at the sides of said shaft, lugs upon said base-plate opposite said lips, sliding yoke and coil springs upon said pole-supporting member and links con-- necting said yoke with said. standards.

In testimony whereof I sign this specificat1on m the presence of two witnesses.

HENRY HOLLAND.

Witnesses:

R. B. MosER, C. A. SELL 

